⚛️ Category

quant-ph

11028 papers

Quantum physics explores the strange and often counterintuitive rules that govern the universe at its smallest scales. This field investigates how particles like electrons and photons behave in ways that defy our everyday intuition, forming the backbone of modern technologies from lasers to future quantum computers. While the mathematics can be daunting, the core ideas promise to revolutionize how we understand reality and process information.

At Gist.Science, we make these complex discoveries accessible to everyone. We systematically process every new preprint published in the Quant-Ph category on arXiv, transforming dense academic papers into clear, plain-language explanations alongside detailed technical summaries. Whether you are a seasoned researcher or a curious reader, our goal is to bridge the gap between cutting-edge theory and human understanding.

Below are the latest papers in quantum physics, distilled to help you grasp the newest breakthroughs without getting lost in the jargon.

🔬 atomic physics

Nuclear slowing-down factors in alkali-metal vapors

This paper refines the effective Bloch description of alkali-metal spin dynamics in the SERF regime by demonstrating that longitudinal and transverse spin relaxation are governed by distinct, polarization-dependent nuclear slowing-down factors, and provides closed-form expressions for residual spin-exchange relaxation at finite magnetic fields, thereby correcting previous overestimations of relaxation rates critical for atomic magnetometers and comagnetometers.

Vasiliki Koutrouli, Georgios Vasilakis, Kostas Mouloudakis2026-09-09
⚛️ quantum physics

Spectral characterization of the uniform theta graph Θ(t,2)\Theta(t,2) and classification of 6-periodic Grover walks

This paper characterizes the uniform theta graph Θ(t,2)\Theta(t,2) via its normalized adjacency spectrum and classifies all connected 6-periodic graphs as either Dutch windmill graphs D3(t)D_3^{(t)} or uniform theta graphs Θ(t,2)\Theta(t,2), while also establishing the periodicity of Grover walks on these nonregular structures.

Sho Kubota2026-09-09
🔬 applied physics

Instantaneous-Frame Theory of Strongly Driven Parametric Gates

This paper proposes an instantaneous-frame theory that accurately describes strongly driven parametric two-qubit gates as coherent rotations between instantaneous eigenstates, overcoming the limitations of conventional idle-basis models and providing a computationally efficient framework for scalable superconducting quantum processors.

Kentaro Kubo, Shinichi Inoue, Jushin Tei, Yinghao Ho, Yasunobu Nakamura, Hayato Goto2026-09-09
⚛️ quantum physics

Efficient quantum state preparation on Quantinuum hardware

This paper presents an end-to-end framework for resource-efficient quantum state preparation and rapid, robust fidelity verification on Quantinuum's H2-1 hardware, achieving a high fidelity of 0.929 for structured states by integrating tensor-network circuits with a novel pre-measurement basis-change technique that drastically reduces the sample complexity of shadow overlap verification.

Archie Butterworth, Josh Green, Yusen Wu, Jie Pan, Jingbo Wang2026-09-09
⚛️ quantum physics

Trapdoor Functions with Secure Key Leasing and Copy Protection

This paper initiates the study of trapdoor functions (TDFs) in the context of secure key leasing and copy protection by defining and constructing TDFs with these unclonable properties under standard cryptographic assumptions, and subsequently leveraging them to build robust public-key encryption and single-decryptor encryption schemes that prevent the destruction of quantum decryption keys.

Fuyuki Kitagawa, Ryo Nishimaki, Yuki Shirakawa, Takashi Yamakawa2026-09-09
⚛️ quantum physics

Causal-Class Hierarchies in Coherence-Constrained Channel Transformation

This paper investigates how causal freedom impacts channel transformation under coherence constraints, revealing a strict causal hierarchy for amplitude-damping channels while demonstrating that mixed-Pauli channels achieve identical optimal performance across all causal strategies due to a structural obstruction caused by free program-state parallelisation.

Lin Zhu, Benchi Zhao, Xuanqiang Zhao, Ranyiliu Chen, Xin Wang, Shenggen Zheng2026-09-09
⚛️ quantum physics

Closing the Loop: Non-Causal Computation, Partial Traces, & Postselected Entanglement

This paper establishes a categorical equivalence between logically consistent non-causal classical circuits and postselected quantum teleportation using maximally entangled Bell states, demonstrating that classical logical consistency corresponds to a specific postselection probability (1/d21/d^2) that ensures the resulting conditional quantum evolution is linear and matches the classical categorical trace.

Mark Carney2026-09-09